British Transport Police have confirmed that a person has died on the railway line near Woolmer Green, between Stevenage and Welwyn.
British Transport Police are not treating the incident as suspicious, and are working to identify the person and inform their family.
The incident has led to severe rail disruption between Stevenage and London King’s Cross, with operator Great Northern estimating cancellations and delays of up to an hour to continue until about 2pm.
Great Northern said some services will be diverted via Hertford North.
A British Transport Police spokesman said: “We were called to the line at 7.31am following reports of a body on the line.
“We attended alongside Hertfordshire Constabulary and the East of England Ambulance Service and a person was pronounced dead at the scene.
“We are not treating this incident as suspicious and a file will be prepared by the coroner.”
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here